US2615923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sodium chlorophenate
Assignee: Mathieson Chemical Corp
•
Filing: 1950-05-02
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Granted: 1952-10-28
•
Expires: 1970-05-02
Abstract
No abstract record available.
Inventors
- 👤 Gustav J Henrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:34
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF PRODUCING A SOLUTION OF A SODIUM CHLOROPHENATE WHICH COMPRISES HYDROLYZING POLYCHLOROBENZENE WITH EXCESS SODIUM HYDROXIDE IN A VOLATILE LOWER ALCOHOL AND WATER MEDIUM, INTRODUCING THE RESULTING REACTION MIXTURE TO A DISTILLATION ZONE, INJECTING STEAM INTO THE LOWER END OF THE DISTILLATION ZONE, REMOVING THE ALCOHOL OVERHEAD, REMOVING A WATER AND STEAM VOLATILE PRODUCT MIXTURE CONTAINING ANISOLS AT AN INTERMEDIATE STAGE OF THE DISTILLATION ZONE, SEPARATING THE INTERMEDIATE PRODUCTMIXTURE INTO AN ORGANIC FRACTION CONTAINING ANISOLS AND AN AQUEOUS FRACTION, RETURNING THE AQUEOUS FRACTION TO THE DISTILLATION ZONE AT A STAGE LOWER THAN THE INTERMEDIATE DRAW-OFF STAGE, AND RECOVERING THE
Claim 2
Independent Claim
101 words
THE METHOD OF PRODUCING A SOLUTION OF A SODIUM CHLOROPHENATE WHICH COMPRISES HYDROLYZING POLYCHLOROBENZENE WITH EXCESS SODIUM HYDROXIDE IN A VOLATILE LOWER ALCOHOL AND WATER MEDIUM, INTRODUCING THE RESULTING REACTION MIXTURE TO A DISTILLATION ZONE, INJECTING STEAM INTO THE LOWER END OF THE DISTILLATION ZONE, REMOVING THE ALCOHOL OVERHEAD, REMOVING A WATER AND STEAM VOLATILE PRODUCT MIXTURE CONTAINING ANISOLS AT AN INTERMEDIATE STAGE OF THE DISTILLATION ZONE, SEPARATING THE INTERMEDIATE PRODUCTMIXTURE INTO AN ORGANIC FRACTION CONTAINING ANISOLS AND AN AQUEOUS FRACTION, RETURNING THE AQUEOUS FRACTION TO THE DISTILLATION ZONE AT A STAGE LOWER THAN THE INTERMEDIATE DRAW-OFF STAGE, AND RECOVERING THE
References Cited (Backward Citations)
US2051782A
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US2068905A
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US2126648A
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US2198292A
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US2390941A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |